Strain-induced 0 - π transition in a zigzag graphene nanoribbonJosephson junction

Strain-induced 0 - π transition in a zigzag graphene nanoribbonJosephson junction

We study theoretically the supercurrent through a superconductor/ferromagnetic zigzag graphene nanoribbon/superconductor junction by the Matsubara Green function method. The transformation of the supercurrent between the 0 and π states is remarkably realized in this Josephson junction by the combina...

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Veröffentlicht in:Applied physics letters 2011-03, Vol.98 (12), p.122106-122106-3
Hauptverfasser: Zou, Jianfei, Jin, Guojun
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Jin, Guojun
description We study theoretically the supercurrent through a superconductor/ferromagnetic zigzag graphene nanoribbon/superconductor junction by the Matsubara Green function method. The transformation of the supercurrent between the 0 and π states is remarkably realized in this Josephson junction by the combination of the uniaxial strain and gate-controlled barrier potential. Such strain-induced 0 - π transition is found to result from the dependence of the effective Fermi velocity on the uniaxial strain in the graphene nanoribbon modulated by mechanical approaches.
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title Strain-induced 0 - π transition in a zigzag graphene nanoribbonJosephson junction
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